Make ansible deployment script for bridge reachability probes on debian stable
This is similar to #12550 (closed), but instead of having to compile an up to date python since the one running on planet-lab is out of date, we just need to install packages via apt-get.
The core of this script will be setting up monitoring on the machine (#12549 (closed)) and a cronjob for running the bridge reachability measurements at a given interval.